Check engine light comes on and stays on for a day or two, then goes off. Showing trouble code PO121 (throttle position sensor). When the light is on, remote start won't work. Help, mudslide

 

<!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:PunctuationKerning/> <w:ValidateAgainstSchemas/> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:Compatibility> <w:BreakWrappedTables/> <w:SnapToGridInCell/> <w:WrapTextWithPunct/> <w:UseAsianBreakRules/> <wontGrowAutofit/> </w:Compatibility> <w:BrowserLevel>MicrosoftInternetExplorer4</w:BrowserLevel> </w:WordDocument> </xml><![endif]--><!--[if gte mso 9]><xml> <w:LatentStyles DefLockedState="false" LatentStyleCount="156"> </w:LatentStyles> </xml><![endif]--><!--[if gte mso 10]> <style> /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} </style> <![endif]--> mudslide,

Could you please provide additional information? Vehicle model and year? How long has this been occurring? Is this a recent issue or a recurring?

Any additional information you can provide may help.

Louis
GM Customer Service

 

'07 Cheveolet Avalanche LT 4WD. The check engine light has been coming on and going off every day or two for more than a month.

 

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I have searched my resources, however, have been unable to find any known throttle position sensor or remote start issues with 2007 Avalanche vehicles. I encourage you to take the vehicle in for an inspection. A certified technician should be able to offer a diagnosis.

If you have any additional questions, please feel free to contact me.

Louis
GM Customer Service